Hey I think you're right! After looking at baseballcardpedias checklist, I saw that they have Moments Triple Relics as SN10
and Moments Triple Relics Silver as SN1 - https://baseballcardpedia.nfshost.com/index.php/2007_Topps_Sterling#Triple
TCDB has the Moments Relics Triple Checklist listed as SN10 AND the Moments Relics Triple Sterling Silver as SN10.
Moments Relics Triple - https://www.tcdb.com/Checklist.cfm/sid/22642/2007-Topps-Sterling---Moments-Relics-Triple
Moments Relics Triple Sterling Silver - https://www.tcdb.com/Checklist.cfm/sid/22643/2007-Topps-Sterling---Moments-Relics-Triple-Sterling-Silver